Great Storms of The North American Great Lakes

Great Storms Of The North American Great Lakes

Ever since people have traveled the Great Lakes storms have taken lives and vessels. The first sailing vessel on the upper lakes, the Le Griffon, was lost on its return from Green Bay in 1679. Since that time, memorable storms have swept the lakes, often in November taking men and ships to their death. With the advent of modern technology and sturdier vessels, fewer such losses have occurred. The large expanse of the lakes allows waves to build to substantial heights and the open water can alter weather systems (fog, lake effect snow). Storm winds can alter the lakes as well with large systems causing storm surges that lower lake levels several feet on one side while raising it even higher on the other. The shallowest lake, Lake Erie, sometime see storm surge rises of 8 or 10 feet. Seiches cause short-term irregular lake level changes, killing people swept off beaches and piers and even sometimes sinking boats The great tolls caused by Great Lakes storms in 1868 and 1869 were one of the main reasons behind establishing a national weather forecasting service, initially run by the U.S. Army Signal Corps using telegraphs to announce approaching storms in a few port cities.